A study of duration of digital dermatitis lesions after treatment in a Danish dairy herd.

Publisher: BioMed Central Country of Publication: England NLM ID: 0370400 Publication Model: Electronic Cited Medium: Internet ISSN: 1751-0147 (Electronic) Linking ISSN: 0044605X NLM ISO Abbreviation: Acta Vet Scand Subsets: MEDLINE

Publication: London : BioMed Central
Original Publication: Copenhagen.

Cattle Diseases/*epidemiology ; Dermatitis/*veterinary ; Foot Diseases/*veterinary; Animals ; Cattle ; Cattle Diseases/pathology ; Denmark/epidemiology ; Dermatitis/epidemiology ; Dermatitis/pathology ; Female ; Foot Diseases/epidemiology ; Foot Diseases/pathology ; Kaplan-Meier Estimate ; Lactation ; Lameness, Animal/etiology ; Parity ; Pregnancy ; Proportional Hazards Models ; Risk Factors ; Time Factors

Digital dermatitis (DD) is a contagious disease of cattle affecting the skin adjacent to the claws. Disease dynamics of DD have been described to some extend, but we still need to quantify the duration of lesions and look into non-treatment factors affecting this. The aim of this study was to estimate the duration of lesions due to DD and to evaluate parity and lactation stage as potential risk factors for longer duration of such lesions. An estimate of the duration of lesions will be a valuable parameter in the evaluation of the economic impact of the disease and will additionally allow estimates of incidence based on prevalence figures. From May 2007 until November 2008, lesions associated with DD in the hind legs of 151 Danish Holstein cows at the Danish Cattle Research Centre were clinically scored on fifteen occasions. The mean interval between recordings was 39 days. Onset and end of each new case were estimated as midway between recordings prior to a change in the presence or absence of a lesion. Kaplan-Meier survival functions and Cox proportional hazard regression were performed to estimate the duration and analyse differences in the duration of lesions between primi- and multiparous cows and between different stages in lactation at onset of the lesion. The median duration of lesions were estimated to be 42 days, less than most previous published estimates. The relatively aggressive regime of topical treatment in the study herd might have shortened the duration of the lesions. Furthermore the comparatively long interval between recordings introduced an element of uncertainty in this estimate. No significant effects of parity or days in milk at lesion onset on the duration of DD were found using these data though lesions developed earlier in the lactation may have a longer duration. Further data would be needed to confirm the latter.

Vet Rec. 2008 Jan 12;162(2):41-6. (PMID: 18192655)
J Dairy Sci. 2005 Jan;88(1):110-20. (PMID: 15591373)
Vet Rec. 2008 Nov 8;163(19):574-6. (PMID: 18997188)
Vet Rec. 1997 Jun 14;140(24):620-3. (PMID: 9228692)
Prev Vet Med. 2002 Mar 14;53(3):215-31. (PMID: 11830295)
Prev Vet Med. 2005 Sep 30;71(1-2):11-21. (PMID: 15985303)

Date Created: 20090703 Date Completed: 20090924 Latest Revision: 20211020

20221213

PMC2717074

10.1186/1751-0147-51-27

19570191